Where to write sb`s question`s answer?

Hi , just click onto their Question, then when you see 'Answer this question ' in a pink box, click onto it. Then a blank box will appear. Type your answer in it and click onto 'Submit' in the pink box. Wait a few seconds and then your answer will appear. Once you have read it and if you see you have made a mistake, click onto 'Edit', fix it up then click onto 'Save'.